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XAS spectra of Ce2[MnN3] at the Ce-M4,5, Ce-L3, MnL2.3 and N-K thresholds

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons126783

Niewa,  R.
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons126666

Hu,  Z.
Zhiwei Hu, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Zitation

Niewa, R., Hu, Z., Grazioli, C., Rößler, U., Golden, M. S., Knupfer, M., et al. (2002). XAS spectra of Ce2[MnN3] at the Ce-M4,5, Ce-L3, MnL2.3 and N-K thresholds. Journal of Alloys and Compounds, 346(1-2), 129-133. doi:10.1016/S0925-8388(02)00519-4.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0015-30D0-B
Zusammenfassung
The X-ray absorption spectroscopy at the Ce-M-4.5, Ce-L-3, Mn- L-2,L-3 and N-K thresholds was used to study the electronic and magnetic structure of the recently obtained Ce-2[MnN3]. Manganese is found to be in a state similar to that in eta- Mn3N2, with strong covalency between Mn and N. The multiple peaked structure in the Ce-M-4.5 and Ce-L-3 XAS spectra indicates that the valence state of cerium in Ce-2[MnN3] is only slightly lower than that found in CeO2 containing Ce-IV with a strong covalent mixture between Ce 4f and ligand 2p states. By simulating the Ce-L-3 XAS spectrum using a simplified Anderson impurity model the 4f occupancy was found to be 0.52 for Ce-2 [MnN3] compared to 0.49 for CeO2 in the ground state. (C) 2002 Elsevier Science B.V. All rights reserved.